x86/head/64: Install startup GDT

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Handling exceptions during boot requires a working GDT. The kernel GDT
can't be used on the direct mapping, so load a startup GDT and setup
segments.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-30-joro@8bytes.org

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Joerg Roedel 2020-09-07 15:15:30 +02:00 • committed by Borislav Petkov

parent 4bed2266cc

commit 866b556efa

3 changed files with 48 additions and 0 deletions

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1

arch/x86/include/asm/setup.h

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33

arch/x86/kernel/head64.c

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14

arch/x86/kernel/head_64.S

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